SECTION: Z2.40.170 NOTICE TO INSTALLER: Instructions must remain with installation. ZM2319 0515 Supersedes 0409 Your Peace of Mind is Our Top Priority ® ® Product information presented here reflects conditions at time of publication. Consult factory regarding discrepancies or inconsistencies. MAIL TO: P.O. BOX 16347 • Louisville, KY 40256-0347 SHIP TO: 3649 Cane Run Road • Louisville, KY 40211-1961 (502) 778-2731 • 1 (800) 928-PUMP • FAX (502) 774-3624 Register your Zoeller Engineered Product on our website: http://reg.zoellerengprod.com/ visit our web site: www.zoeller.com OWNER’S MANUAL 69 HD SERIES SUBMERSIBLE UNITS Congratulations on the purchase of the Zoeller 69 HD Series submersible pump. For over sixty years the name Zoeller has represented the standard for submersible dewatering and sewage pumps. The same high quality workmanship and easy maintenance design has been incorporated into this line of heavy-duty solidshandling submersible sewage pumps. This Zoeller pump will provide years of trouble-free service when installed according to the manufacturers’ recommendations. This manual incorporates the installation, operation, maintenance, and service instructions into one document to aid in the ownership of a Zoeller submersible wastewater product. Please read and review this manual before installing the product. Follow the steps and procedures listed on ZM1074 for a proper start-up. Many items contained within, when followed correctly, will not only ensure a long and problem-free life for the pump, but also save time and money during installation. Reference ZM2331 for repair manual on 69 HD Series Pumps. Should further assistance be necessary please call our Technical Service Department at 1-800-928-PUMP (7867). Table of Contents Safety Instructions Safety Instructions........................................................................ 1 TO AVOID SERIOUS OR FATAL PERSONAL INJURY OR MAJOR PROPERTY DAMAGE, READ AND FOLLOW ALL SAFETY INSTRUCTIONS IN THIS MANUAL AND ON THE PUMP. Limited Warranty........................................................................... 2 Preinstallation Information........................................................... 3 Electrical Data................................................................................ 3 Typical Dewatering Installation.................................................... 4 Typical Sewage Installation ......................................................... 4 THIS MANUAL IS INTENDED TO ASSIST IN THE INSTALLATION AND OPERATION OF THIS UNIT AND MUST BE KEPT WITH THE PUMP. Pump Wiring Instructions..........................................................5-6 Operation.....................................................................................6-7 Maintenance................................................................................7-8 Service Checklist........................................................................... 8 Owner’s Information Model Number: _______________ Date Code: _______________ Serial Number: Pump 1_____________ Pump 2_____________ Simplex Panel P/N ______________________________ Duplex Rail System P/N ________________________ Job Name: _____________________________________________ Distributor: ____________________________________________ Sales Order Number: ____________________________________ CAUTION This is a SAFETY ALERT SYMBOL. When you see this symbol on the pump or in the manual, look for one of the following signal words and be alert to the potential for personal injury or property damage. Warns of hazards that WILL cause serious personal injury, death or major property damage. Warns of hazards that CAN cause serious personal injury, death or major property damage. Warns of hazards that CAN cause personal injury or property damage. INDICATES SPECIAL INSTRUCTIONS WHICH ARE VERY IMPORTANT AND MUST BE FOLLOWED. THOROUGHLY REVIEW ALL INSTRUCTIONS AND WARNINGS PRIOR TO PERFORMING ANY WORK ON THIS PUMP. MAINTAIN ALL SAFETY DECALS. Contractor: ____________________________________________ Date of Installation: ____________________________________ System Readings During Operation: Voltage _____ Amps ______ REFER TO WARRANTY ON PAGE 2. © Copyright 2015 Zoeller® Co. All rights reserved. Limited Warranty Manufacturer warrants, to the purchaser and subsequent owner during the warranty period, every new product to be free from defects in material and workmanship under normal use and service, when properly used and maintained, for a period of one year from date of purchase by the end user, or 18 months from date of original manufacture of the product, whichever comes first. Parts that fail within the warranty period, one year from date of purchase by the end user, or 18 months from the date of original manufacture of the product, whichever comes first, that inspections determine to be defective in material or workmanship, will be repaired, replaced or remanufactured at Manufacturer's option, provided however, that by so doing we will not be obligated to replace an entire assembly, the entire mechanism or the complete unit. No allowance will be made for shipping charges, damages, labor or other charges that may occur due to product failure, repair or replacement. This warranty does not apply to and there shall be no warranty for any material or product that has been disassembled without prior approval of Manufacturer, subjected to misuse, misapplication, neglect, alteration, accident or act of God; that has not been installed, operated or maintained in accordance with Manufacturer's installation instructions; that has been exposed to outside substances including but not limited to the following: sand, gravel, cement, mud, tar, hydrocarbons, hydrocarbon derivatives (oil, gasoline, solvents, etc.), or other abrasive or corrosive substances, wash towels or feminine sanitary products, etc. in all pumping applications. The warranty set out in the paragraph above is in lieu of all other warranties expressed or implied; and we do not authorize any representative or other person to assume for us any other liability in connection with our products. Contact Manufacturer at, 3649 Cane Run Road, Louisville, Kentucky 40211, Attention: Customer Service Department to obtain any needed repair or replacement of part(s) or additional information pertaining to our warranty. MANUFACTURER EXPRESSLY DISCLAIMS LIABILITY FOR SPECIAL, CONSEQUENTIALOR INCIDENTALDAMAGES OR BREACH OF EXPRESSED OR IMPLIED WARRANTY; AND ANY IMPLIED WARRANTY OF FITNESS FOR A PARTICULAR PURPOSE AND OF MERCHANTABILITY SHALL BE LIMITED TO THE DURATION OF THE EXPRESSED WARRANTY. Some states do not allow limitations on the duration of an implied warranty, so the above limitation may not apply to you. Some states do not allow the exclusion or limitation of incidental or consequential damages, so the above limitation or exclusion may not apply to you. This warranty gives you specific legal rights and you may also have other rights which vary from state to state. Each Zoeller 69 HD Series Pump installation is required to have a completed Zoeller Engineered Products Start-up Report (ZM1074). The report is to be completed by an approved Start-up Technician in the presence of the installing contractor. A copy of this report will be on file at the Zoeller Engineered Products offices in Louisville, KY, which will establish the start-up date. © Copyright 2015 Zoeller® Co. All rights reserved. 2 Preinstallation Information 1. Inspect your pump. Occasionally, products are damaged during shipment. If the unit is damaged, contact your dealer before using. DO NOT remove the oil fill plug in thrust bearing housing. 2. Carefully read the literature provided to familiarize yourself with specific details regarding installation and use. These materials should be retained for future reference. CAUTION SEE BELOW FOR LIST OF WARNINGS 1. Do not lift, carry, or hang pump by the electrical cables. Damage to the electrical cables can cause shock, burns or death. 2.Make sure there is a properly grounded connection available. All pumps are furnished with provisions for proper grounding to help protect you against the possibility of electrical shock. 3. Make certain that the control box is within the reach of the pump’s power supply cord. DO NOT USE AN EXTENSION CORD. Extension cords that are too long or too light do not deliver sufficient voltage to the pump motor. But, more important, they could present a safety hazard if the insulation were to become damaged or the connection end were to fall into the sump. 4.Make sure the pump electrical supply circuit is equipped with fuses and disconnect or circuit breakers of proper capacity. A separate branch circuit is recommended, sized according to the “National Electrical Code” for the current shown on the pump nameplate. 5. C are should be taken during the initial installation to be sure that adequate air supply is available whenever any person is in the basin. Always follow OSHA guidelines on confined space requirements. 6.Risk of electric shock - These pumps have not been investigated for use in swimming pool areas. SEE BELOW FOR LIST OF CAUTIONS 1. Check to be sure your power source is capable of handling the requirements of the motor, as indicated on the pump nameplate. 2. The installation of pumps using auxiliary variable level float switches is the responsibility of the installing party and care should be taken that the tethered float switch will not hang up on the pump apparatus or pit peculiarities and is secured so that the pump will shut off. It is recommended that rigid piping and fittings be used. 3. INFORMATION - VENT HOLE PURPOSE. It is necessary that all submersible pumps capable of handling various sizes of solid waste be of the bottom intake design to reduce clogging and seal failures. If a check valve is incorporated in the installation, a vent hole (approx. 3/16”) must be drilled in the discharge pipe below the check valve and pit cover to purge the unit of trapped air. Water stream will be visible from this hole during pump run periods. This vent hole should be checked periodically for clogging and cleaned as necessary. Trapped air is caused by agitation and/or a dry basin. 4. Water hammer creates momentary high pressure surges. These surges can cause severe damage to check valves and the piping system. Consideration for water hammer must be included in the piping system design. Reference ASPE Data Book, Chapter 2.33. Some systems may require external spring or lever weighted check valves or other engineered solutions. 5. Three phase pumps must be connected for proper rotation, which is counterclockwise looking into impeller inlet. See page 4 for instructions for checking 3 phase rotation. Electrical Data Frame Size 210 250 320 360 *Consult Factory. Amps Full Load Locked Rotor KVA Code Letter 60 52.6 262.2 F 3 60 26.3 131.1 F 230 3 60 62.8 344.2 F 460 3 60 31.4 172.1 F Model BHP RPM Voltage Phase Hertz F6920 20 1725 230 3 G6920 20 1725 460 F6921 25 1725 G6921 25 1725 F6923 30 1725 230 3 60 74.6 434.4 G G6923 30 1725 460 3 60 37.3 217.2 G F6924 40 1725 230 3 60 99.2 546.0 F G6924 40 1725 460 3 60 49.6 273.0 F F6925 50 1725 230 3 60 128.0 690.0 F G6925 50 1725 460 3 60 64.0 345.0 F F6926 60 1725 230 3 60 142.0 756.0 F G6926 60 1725 460 3 60 71.0 378.0 F F6927 75 1725 230 3 60 174.0 1120.0 G G6927 75 1725 460 3 60 87.0 560.0 G F6928 100 1725 230 3 60 232.0 1524.0 G G6928 100 1725 460 3 60 116.0 762.0 G © Copyright 2015 Zoeller® Co. All rights reserved. 3 Typical Sewage/Waste Pumping System Installation All installations must comply with all applicable electrical and plumbing codes, including, but not limited to, National Electric Code, local, regional, and/or state plumbing codes, etc. TYPICAL OUTDOOR CONCRETE BASIN WITH VALVE BOX AND HINGED ACCESS COVERS 3 7 4 4 7 16 1 10 8 10 2 13 14 9 11 NOTE: Maximum pump submergence not to exceed 150 feet in depth and or 150 PSI working pressure at motor lower seal. 6 XXXXXX-X 6 12 LOUISVILLE, KY. 15 ZEPA0592 (1) Electrical wiring and protection must be in accordance with the National Electrical Code, and any other applicable state and local electrical requirements. (2) Install proper full flow check and shut-off valve. (3) Install proper controls. (Outdoor panels require NEMA 3R or 4X enclosure) (10) Basin must be in accordance with all applicable codes and specifications. Basin must be sized to allow a minimum 3 minute lapse time between starts. (4) All installations require a basin cover to prevent debris from falling into the basin and to prevent accidental injury. (11) Pump must be level and the tethered variable level float switch must be free and not hang up on pump or pit peculiarities. (5) Gas tight seals are required in all indoor sewage installations to contain gases and odors. (12)If a rail system is used, discharge elbow must be firmly anchored to the bottom of basin. In fiberglass basin, the bottom will need to be reinforced if the discharge elbow is used. (6) When check valve is installed, drill a 3/16" diameter hole in the discharge pipe below the check valve even with the top of the pump. NOTE: The hole must be below the basin cover and cleaned periodically. Water stream will be visible from this hole during pump run periods. Also a vent hole is drilled in the pump housing. Be sure that this hole is cleared during any servicing. (7) Vent gases and odors to the atmosphere through vent pipe per Local and State codes. (8) Secure power cord to avoid entanglement with variable level float switch mechanism. (9) Do not reduce pump discharge pipe. (13) Recommended guide rail material; stainless steel or galvanized steel. (14) Install ring and cable for lifting pump from pit. (15) Basin must be clean and free of debris after installation. (16) Cords must be properly sealed to prevent moisture and gases from entering the control panel. © Copyright 2015 Zoeller® Co. All rights reserved. 4 Pump Wiring Instructions Installation and checking of electrical circuits and hardware should be performed by a qualified licensed electrician. “Risk of electrical shock” Do not remove power supply cord and strain relief or connect conduit directly to the pump. CAUTION Power cords, sensor cords, and float cords all must be sealed to prevent gases from the basin entering the control panel. INSTRUCTIONS FOR CHECKING ROTATION OF THREE PHASE UNITS It is very important that these units be connected for proper rotation. Since no rotating parts are visible without removing the pump from the pit, the rotation on 3 phase units should be checked before installation into the pit as follows: After the proper electrical connections are made, momentarily energize the pump observing the direction of kick back due to starting torque. The rotation is correct if the kick back is in the opposite direction of the rotation arrow. If the rotation is not correct, disconnect power and switch any two power leads. Turn power back on and retest for proper rotation. THERMAL SENSOR PROTECTION Two thermal sensors and leads are wired adjacent to the motor windings. When the temperature exceeds the maximum recommended limit, the pump will deactivate when the lead wires are connected to the magnetic starter circuit of a control panel with the thermal cutout feature. Continual deactivation of this circuit requires attention from maintenance personnel (See Fig. 1). NOTE: If current through the thermostats exceeds the values listed in Table 1, an intermediate control circuit relay must be used to reduce the current or the thermostats will not work properly. Table 1: Maximum Current Capacity of Motor Thermostat Volts (VAC) Continuous Amperes Inrush Amperes 110-120 3.0 30 220-240 1.5 15 440-480 0.75 7.5 550-600 0.6 6.0 MOISTURE SENSORS (1) Sensor cord conductors are connected to sensors probes in the lower cavity of the motor housing. The conductor wires are terminated in the control panel for activating an indicator light when moisture is present in the lower cavity of the motor housing. (2) When the moisture indicator light is activated, the lower seal has allowed leakage of water into the thrust bearing housing. The pump should be serviced within 30 days to avoid damage to the motor and bearings. (3) Oil in the thrust bearing housing must be checked when pump is serviced. If oil from the thrust bearing housing contains water or other contamination, both seals should be replaced during maintenance. Always replace with new factory recommended oil and service parts. All warranty repairs must be made by Zoeller Authorized Service Stations. (4) Moisture sensor circuit can be checked for continuity (complete circuit) with a (Volt-OHM-Meter). Set the VOM to read resistance and connect the VOM leads to the sensor cord red and orange wires. The VOM should read approximately 330k Ohms. Resistance readings significantly lower indicate a seal leak with water in the motor housing chamber. If VOM reading is open then a problem exists with moisture sensor circuit. Check resistance between the green ground conductor of the pump power cord and the sensor cord red and orange wires. This resistance reading should indicate an open circuit. If VOM reading returns a reading other than open, then a problem exists with the sensor circuit wiring or cordage. If resistance readings show a problem with either test, then pump should be repaired by a Zoeller Authorized Service Station (See Fig. 1). CONTROL PANELS These pumps are nonautomatic. They require a control panel. A motor starter circuit, control circuit, and alarm circuit within the panel are standard features. Outdoor enclosures and alternating relays are often required. Variable level float switches are the most common level sensing device. The following should be noted. (1) A pump incorporating the seal failure sensor and thermal sensor protection require that interfacing terminals and functions be incorporated into the panel. (2) All pumps require overload protection in panel. Use with approved motor control that matches motor input in full load amperes with overload element(s) selected or adjusted in accordance with control instructions. (3) Hazardous Location pumps require panels that offer intrinsically safe relays and all other NEC requirements must be followed (See Article 500,501 & 502 plus any others that apply.) POWER AND SENSOR CORD, LEAD IDENTIFICATION BLACK BLACK & WHITE LEADS TEMPERATURE SENSOR WHITE RED & ORANGE LEADS SEAL FAILURE SENSOR RED GREEN GROUND LEAD 4 LEAD SENSOR CORD POWER CORD © Copyright 2015 Zoeller® Co. All rights reserved. 5 ZEPA0586 Three Phase Installation Three phase pumps are nonautomatic. To operate automatically, a control panel is required. Follow the instructions provided with the panel to wire the system. Before installing a pump, check the pump rotation to insure that wiring has been connected properly to power source, and that the green lead of power cord (See wiring diagram), is connected to a valid ground, Momentarily energize the pump, observing the directions of kick back due to starting torque. Rotation is correct if kick back is in the opposite direction of rotation arrow on the pump casing. If rotation is not correct, switching of any two power leads other than ground, should provide the proper rotation. Fig. 1 TYPICAL 3-PHASE WIRING DIAGRAM 3ø VAC L1 L2 L3 T1 T2 T3 RECOMMENDED THERMAL SENSOR CONNECTED IN SERIES WITH STARTER COIL W2 W1 POWER CABLE BLACK WHITE RED GREEN P2 P1 WHITE BLACK SENSOR CABLE ORANGE RED THERMAL SENSOR (N/C) SEAL FAILURE PROBES 330K OHMS RESISTANCE 3 PHASE MOTOR SEAL FAILURE MOISTURE SENSOR LEADS MUST BE CONNECTED TO INDUCTION CIRCUIT IN THE CONTROL PANEL. HAZARDOUS LOCATION PUMP REQUIRE THIS CONNECTION TO BE MADE TO AN INTRINSICALLY SAFE RELAY Refer to Sensor and Control Panel sections on page 5. ZEPA0590 Operation GENERAL Zoeller pumps are lubricated and tested at the factory prior to shipment and require minimum pre-start-up maintenance (Performance Test under submerged condition optional). Maximum continuous operating temperature of pump liquid for standard model pumps must not exceed 104° F (40° C). For longest service life all pumps should be totally submerged on long pumping cycles and a maximum of ½ hour run time per hour. These units are not designed to handle liquids other than water or sewage. If pump is used in water contaminated with heavy, viscous, or abrasive materials, the warranty will be voided. NAMEPLATE DATA The nameplate, located on the side of pump, indicates specific information about the construction of the pump. The model number, date code, and serial number information should be recorded on the front page in the “Owner’s Information” section of this manual. SHORT TERM STORAGE If pump is to be stored, the following is advised: • Store pump inside whenever possible or cover with some type of protective covering. • Remove from crate and store in erect position in a protected area. • Tape or seal in plastic bag the terminal ends of wire leads. • Spray coat unpainted surfaces with rust inhibiting oil. • The impeller should be rotated every 30 days in order to keep the seals lubricated and not develop a permanent set. If panel is to be stored, the following is advised: • Store the panel inside whenever possible and leave in the shipping box. • All openings shall be sealed. • Store in an upright position. • Do not stack anything on top of panel. START-UP PROCEDURE Before placing the equipment into operation, check the following: • Correct pump rotation. • Clean pit. • Panel dry and securely installed. • Floats positioned properly. • Discharge valves open. • 3/16” vent hole drilled in pipe between check valve and pump. Once the above has been verified proceed with the following checks: • Pump power cables properly connected to panel. • Float cables properly connected to panel. • Conduit connections to panel are properly sealed. • Thermal overload adjustments made in the panel. © Copyright 2015 Zoeller® Co. All rights reserved. 6 Operation (continued) • After installing the pump into the containment area, with adequate submergence, open the discharge valve fully. Start the unit using manual controls. If flow is appreciably less than rated performance, pump may be air locked. To expel trapped air, jog the unit several times, using the manual controls. • Have a qualified electrician take voltage and current measurements on all three power wires of three phase with the pump running. Record these readings in the space provided in the “Owner’s Information” section on page 1 of this manual for future reference. After the preoperational functional test has been completed, system is ready for operation. Zoeller requires completing a Start-up Report (ZM1074) whenever a system is started for the first time or after a system has had a significant change take place (i.e. pump replacement, overhaul, etc.). A copy of the Start-up Report should remain with the system for future reference. ADJUSTMENT PROCEDURE Pumps: No adjustments are required other than assuring correct rotation. Panels: The thermal overloads in the panel must be set to the F.L.A. rating on the pump nameplate (or refer to pump data sheet). Floats: Refer to the system drawing for desired location of each float function. Valves: Discharge valves should be placed in the fully open position. Systems should not be operated for extended periods of time with the discharge valves partially closed due to damaging the valve. SHUTDOWN PROCEDURES If a system is shutdown for more than six months, the following is recommended: Pumps: If pit is to remain dry, then the pump can remain in the pit. With the pump in the pit, it should be operated for five minutes once every three months. If the pit is to remain wet, the pump should be removed and stored as noted above. Panels: The panel should have all openings sealed to prevent moisture and dust from entering the enclosure. Prior to restarting system, the panel should be inspected for presence of moisture and any loose connections. Valves: Consult the valve/actuator supplier for information concerning these systems components. Maintenance Repair and service should be performed by a Zoeller Pump Company Authorized Service Station only. If pumps are to be stored for more than six months, refer to short term storage procedure in the Operation section. Repair and service of pumps with explosion proof motors must be performed by a firm approved by Zoeller Company. The firm must be certified to work on explosion proof motors if motor housing, thrust bearing housing or cord cap is repaired. Contact Zoeller Technical Service Department regarding warranty issues. If repair to the motor housing, thrust bearing housing or cord cap is disassembled or repaired by a firm not certified to work on explosion proof motors, the explosion proof rating is void and the FM approval tag MUST BE REMOVED FROM THE PUMP. PREVENTIVE MAINTENANCE Preventive maintenance is recommended to ensure a long service life from the product. Provided is a suggested maintenance schedule. SAFETY PROCEDURES For your protection, always disconnect pump and panel from its power source before handling. Never enter the basin until it has been properly vented and tested. Any person entering a basin should be wearing a harness with safety rope extending to the surface so that they can be pulled out in case of asphyxiation. Sewage water gives off methane and hydrogen sulfide gases, both of which can be highly poisonous. Installation and checking of electrical circuits and hardware should be performed by a qualified electrician. Pump is never to be lifted by power cord. to servicing. Unit must be flushed and disinfected, inside and out, prior GENERAL SYSTEM INSPECTION Before the system is placed into operation, a system Start-up Report should be conducted by a qualified technician. Wiring and grounding must be in accordance with the national electrical code and all applicable local codes and ordinances. LUBRICATION PROCEDURES No lubrication is required. Every month: • Inspect float switches for any material that might be lodged and imparing their operation. • Listen for proper check valve operation. • On duplex unit and if equipped with ET meters, check to see if elapsed time is balanced between the two pumps. Any gross unbalance indicates a defective unit, float switch or control. • Inspect the panel for any presence of moisture in enclosure, loose connections, and general component condition. • Check moisture sensor circuit by means of the test button on the relay, or by measuring the resistance of the moisture sensing circuit. Resistance should be no less than 300,000 ohms. Every year: • In addition to the monthly checks, the basin should be inspected and cleaned. Any defective components should be replaced. Inspect and remove any sand, debris, or mud present in the pump basin assembly. Every two years: • Check insulating oil in thrust bearing housing. • Inspect oil for contaminations. Milky, emulsified oil - Seals have failed. Unit must be returned to an authorized service facility for service. • Inspect power cables for damage or wear. Replace immediately if damage or wear is detected. • Inspect impeller for damage or wear. Replace as required by a Zoeller Authorized Service Station. • Drain, flush and refill the thrust bearing housing with new oil (properly dispose of old insulating oil.) Refer to Maintenance Manual. • Inspect power cable for any signs of abrasion or damage that might affect the integrity of the outer jacketing. • Inspect impeller and casing wear rings for unusual wear. Replace parts if required. © Copyright 2015 Zoeller® Co. All rights reserved. 7 Maintenance (continued) Every five years: • A complete overhaul by a competent service repair shop should include the following: • Completely dismantle the pump and motor. • Clean and inspect all parts. • Inspect all mechanical seal parts. • • • • Replace worn or damaged parts. Replace ball bearings regardless of condition. Replace all “O” rings and gaskets. Inspect motor stator for any sign of abrasion and burned spots on the winding. Conduct an insulation test. Refer to the factory for values. Service Checklist & Trouble Shooting ELECTRICAL PRECAUTIONS Before servicing a pump, always shut off the main power breaker to the panel and then disconnect the pump - making sure you are wearing insulated protective sole shoes and are not standing in water. Under flooded conditions, contact your local electric company or a qualified licensed electrician for disconnecting electrical service prior to pump removal. Submersible pumps contain oils which become pressurized and hot under operating conditions - allow 2½ hours after disconnecting before attempting service. CONDITION A. Pump will not start or run. Steps No. 1 Check Voltage At If No Voltage If Voltage Line terminals in pump’s control panel L1 - L2 - L3 (3 Phase) Check Disconnect switch, line fuse, and/or circuit breakers in power supply circuit. Proceed to No. 2 Check for control circuit voltage. Check out magnetic starter contacts, thermal overloads, and float switches Check pump for ground and binding impeller No. 2 Pump motor terminals in pump’s control panel T1 - T2 - T3 COMMON CAUSES B. Motor overheats and trips overload or blows fuse. Incorrect Voltage; Unbalanced power source; Incorrect motor rotation; Negative or low head; Excessive water temperature; Pump off Switch set too low; Impeller or seal mechanically bound; Motor shorted; Lost one line in a Three Phase unit. C. Pumps starts and stops too often. Check valve stuck open; Level controls out of adjustment; Temperature sensor tripping; Thermal overload switch out of adjustment or defective; Pit too small. D. Pump will not shut off. Debris under float switch; Float travel obstructed; Defective or damaged float switch; Magnetic starter contacts shorted; Air lock - check vent hole. E. Pump operates but delivers little or no water. Check for plugged Pump housing, discharge pipe or sticking check valve; Vent hole clogged or not drilled; Discharge head exceeds pumps capacity; Low or incorrect voltage Incorrect motor rotation. F. Drop in head and/or capacity after a period or use. Increase Pipe Friction; Clogged line or check valve; Abrasive material & chemical, deteriorated impeller and pump housing If the above check list does not uncover the problem, consult the factory - Do not attempt to service or otherwise disassemble pump. © Copyright 2015 Zoeller® Co. All rights reserved.
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